/Engine/Source/Editor/SequencerCore/Public/MVVM/Extensions/DynamicExtensionContainer.h
template<typename T, typename... InArgTypes> T & AddDynamicExtension ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FViewModel](API\Editor\SequencerCore\MVVM\ViewModels\FViewModel) > InOwner, InArgTypes &&... Args )